fix

.github/workflows/tests.yml

@@ -87,7 +87,7 @@ jobs:
           uv pip install --system --no-build-isolation -e ".[dev]" --constraints torch-constraints.txt
           set -o pipefail
           python scripts/unsloth_install.py | bash
-          python scripts/cutcrossentropy_install.py --uv | bash
+          python scripts/cutcrossentropy_install.py | bash
 
       - name: Make sure PyTorch version wasn't clobbered
         run: |
@@ -159,10 +159,10 @@ jobs:
           uv pip install --system build
           python -m build --sdist
           uv pip install --system dist/*.tar.gz
-          python scripts/unsloth_install.py | sh
-          python scripts/cutcrossentropy_install.py --uv | sh
           printf "torch==${{ matrix.pytorch_version }}\n" > torch-constraints.txt
           uv pip install --system ".[dev]" --constraints torch-constraints.txt
+          python scripts/unsloth_install.py | sh
+          python scripts/cutcrossentropy_install.py | sh
 
       - name: Make sure PyTorch version wasn't clobbered
         run: |

cicd/Dockerfile.jinja

@@ -33,20 +33,20 @@ RUN if [ "$NIGHTLY_BUILD" = "true" ] ; then \
         sed -i 's#"datasets[^"]*"#"datasets @ git+https://github.com/huggingface/datasets.git@main"#' pyproject.toml; \
     fi
 
-RUN uv pip install packaging==23.2 setuptools==75.8.0
+RUN uv pip install --system packaging==23.2 setuptools==75.8.0
 RUN if [ "$AXOLOTL_EXTRAS" != "" ] ; then \
         uv sync --frozen --extra ring-flash-attn --extra optimizers --extra ray $(printf ' --extra %s' "${AXOLOTL_EXTRAS//,/ }") $AXOLOTL_ARGS; \
     else \
         uv sync --frozen --extra ring-flash-attn --extra optimizers --extra ray $AXOLOTL_ARGS; \
     fi
 
-RUN uv pip install --no-build-isolation flash-attn $AXOLOTL_ARGS
+RUN uv pip install --system --no-build-isolation flash-attn $AXOLOTL_ARGS
 
 RUN python scripts/unsloth_install.py | sh
 RUN python scripts/cutcrossentropy_install.py | sh
 
 # So we can test the Docker image
-RUN uv pip install -e ".[dev]"
+RUN uv pip install --system -e ".[dev]"
 
 # fix so that git fetch/pull from remote works
 RUN git config remote.origin.fetch "+refs/heads/*:refs/remotes/origin/*" && \

scripts/cutcrossentropy_install.py

@@ -1,40 +1,22 @@
-"""Emit the install command for the Axolotl cut-cross-entropy fork."""
+"""Print the pip command to install Axolotl's cut_cross_entropy fork."""
 
 from __future__ import annotations
 
-import shutil
 import sys
 
 try:
     import torch
-except ImportError as exc:  # pragma: no cover - defensive
+except ImportError as exc:  # pragma: no cover
     raise ImportError("Install torch via `pip install torch`") from exc
 
 from packaging.version import Version as V
 
-USE_UV_FLAG = "--uv" in sys.argv[1:]
+if V(torch.__version__.split("+")[0]) < V("2.6.0"):
-USE_PIP_FLAG = "--pip" in sys.argv[1:]
-
-if USE_UV_FLAG and USE_PIP_FLAG:
-    raise SystemExit("Specify only one of --uv or --pip")
-
-if USE_PIP_FLAG:
-    use_uv = False
-elif USE_UV_FLAG:
-    use_uv = True
-else:
-    use_uv = shutil.which("uv") is not None
-
-if V(torch.__version__) < V("2.4.0"):
     print("")
     sys.exit(0)
 
-# No need to uninstall in CI runs; the environment is fresh. Just emit the install command.
+print(
-installer = "uv pip install --system" if use_uv else "pip install"
+    "python -m pip install "
-command = (
-    f"{installer} "
     '"cut-cross-entropy[transformers] '
     '@ git+https://github.com/axolotl-ai-cloud/ml-cross-entropy.git@147ea28"'
 )
-
-print(command)

scripts/unsloth_install.py

@@ -1,7 +1,8 @@
-"""Emit the uv commands needed to install Unsloth without touching torch."""
+"""Emit the install commands for Unsloth without altering torch."""
 
 from __future__ import annotations
 
+import shutil
 import sys
 from shlex import quote
 
@@ -14,16 +15,34 @@ from packaging.version import Version as V
 
 MIN_TORCH = V("2.6.0")
 
-python_version = V(torch.__version__.split("+")[0])
+if V(torch.__version__.split("+")[0]) < MIN_TORCH:
-if python_version < MIN_TORCH:
     raise RuntimeError(
         f"Torch {torch.__version__} detected, but Unsloth requires >= {MIN_TORCH}."
     )
 
-python_path = quote(sys.executable)
+USE_UV_FLAG = "--uv" in sys.argv[1:]
-commands = (
+USE_PIP_FLAG = "--pip" in sys.argv[1:]
-    f"uv pip install --python {python_path} --no-deps unsloth-zoo==2025.9.12 && "
-    f'uv pip install --python {python_path} --no-deps "unsloth[huggingface]==2025.9.9"'
-)
 
-print(commands)
+if USE_UV_FLAG and USE_PIP_FLAG:
+    raise SystemExit("Specify only one of --uv or --pip")
+
+if USE_PIP_FLAG:
+    use_uv = False
+elif USE_UV_FLAG:
+    use_uv = True
+else:
+    use_uv = shutil.which("uv") is not None
+
+python_exe = quote(sys.executable or shutil.which("python3") or "python")
+
+if use_uv:
+    installer = "uv pip install --system --no-deps"
+else:
+    installer = f"{python_exe} -m pip install --no-deps"
+
+commands = [
+    f"{installer} unsloth-zoo==2025.9.12",
+    f'{installer} "unsloth[huggingface]==2025.9.9"',
+]
+
+print(" && ".join(commands))